Air-valve for water-cocks.



No. 685,|69. Patented Oct. 22, |90I. W. PA'UL.

AIR VALVE FOR WATER COCKS.

(Application led Jan. 29, 1901.).

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UNITED STATES PATENT EErcE.

WILLIAM PAUL, OF SAVANNAILGEORGIA.

AIR-VALVE FOR .WATER-COCKS.

SPECIFICATION forming part of Letters Patent No. 685,169, dated October 22,1901. Application filed January 29| 1901. Serial No. 45,199. (No model.)

To @ZZ whom, it may concern:

Be it known that I, WI'LLAM PAUL, a citizen of the United States, and a resident of Savannah,in the county of Chatham and State of Georgia, have invented a new and Improved Air-Valve for Water-Cocks, of which the fo1. lowing is a full, clear, and exact description.

This invention relates to improvements in air-valves for water-cocks; and the object is to provide, in connection with a water-cock, an air-inlet-controlling valve held normally in closed position by water-pressure, but automatically opening upon `opening the draincock to permit the entrance of air to cause a thorough draining of the pipe in freezing weather. l

Iwill describe an airvalve for water-cocks embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both gures.

Figure lis a sectional view of a water-cock, showing a valve embodying my invention as applied thereto; and Fig. 2 is a section, on an enlarged scale, of the water-cock-valve plug and the air-controlling valve.

Referring to the drawings, l designates a water-cock, and 2 a screw-plug valve operating therein and having a packing 3 at its lower end for engaging with the valve-seat 4.. This valve-plug 2 has a vertical opening 5, from which air-ports 6 lead. Having screwthread engagement with this opening 5 is a sleeve 7, the lower end of which is provided with a valve-seat 8 for receiving a valve 9, which,as shown in Fig. 2, is made cupsh'aped, and inserted in the cup is a packing l0. The stern ll of the valve passes loosely through the sleeve 7, so that air may freely pa'ss between said stem and the interior surface of the sleeve. The valve is guided in its vertical movementby means, as here shown, of a pin 12, extending through the upper portion of the stern and engaging at its ends with the wall of the opening 5.'

In operation the water-pressure when the 'plugvalve is closed will hold the valve 9 closely against its seat, preventing thel escape of water. W'hen, however, it is desired to drain a pipe, upon opening the drain-cock of the pipe the pressure of course will be reL lievedand the valve will fall by gravity, so that air may pass thro ugh the ports 6 and into the supply-pipe, causing all lthe water to dis# charge therefrom.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A water-cock, a plug-valve operating therein, the said plug-valve having a vertical opening withwhich an air-port communi- Cates, a sleeve having screw-thread engagement in said opening and having a valve-seat at its lower end, a valve for engaging with said seat, a stem extended from the valve vloosely through 'said sleeve, and a guide on the inner end of said valvestem, substantially as specified. f

2. A water-cock, a valve operating therein for controlling lche water, the said valve having a vertical opening and provided with airports Vcommunicating with said opening, a sleeve screwing into said opening and having a valve-seat at its outer end, a cup-shaped valve for engaging said seat and provided with a packing, the said cup-shaped valve having a stem passing loosely through said sleeve and extending beyond the 'inner end thereof, and a pin extending through the inn'er end of the stem and serving as a guide for the said valve, the said pin being adapted to rest on the inner end of the sleeve when the val-ve moves from its seat, as set forth.

In testimony whereof I have signed my name to this specification in, the presence of two subscribing witnesses.

WILLIAM PAUL.-

Witnesses:

W. G. WooDFIN, J. L. MURPHY. 

